CTSOCytosorbents Corp
- Market cap
- $16.61M
- as of 2026-10-23
- Latest close
- $5.27
- as of 2026-10-23
- Sector
- Healthcare
- as of 2026-10-24
- Industry
- Medical Devices
- as of 2026-10-24
Cluster
3 insiders bought $120.4K between Sep 4 – Sep 15.
Under the default rule (14d · ≥2 insiders · all roles).
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | Holding change | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|---|
| Chan Phillip P.Chief Executive Officer | Sep 4 | Sep 9 | P | 200,000 | $0.35 | Purchase +$70,000 | 1,944,432 | +11.5% | No | Form 4 |
| Capponi VincentPresident and COO | Sep 14 | Sep 16 | P | 1,800 | $6.07 | Purchase +$10,926 | 40,114 | +4.7% | No | Form 4 |
| Capponi VincentPresident and COO | Sep 14 | Sep 16 | P | 273 | $5.90 | Purchase +$1,611 | 40,387 | +0.7% | No | Form 4 |
| Sobel Alan D. | Sep 15 | Sep 16 | P | 1,900 | $6.12 | Purchase +$11,628 | 9,287 | +25.7% | No | Form 4 |
| Sobel Alan D. | Sep 15 | Sep 16 | P | 500 | $6.05 | Purchase +$3,025 | 9,787 | +5.4% | No | Form 4 |
| Sobel Alan D. | Sep 15 | Sep 16 | P | 100 | $6.01 | Purchase +$601 | 9,887 | +1.0% | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Sep 15 | Sep 16 | P | 3,774 | $6.00 | Purchase +$22,644 | 100,996 | +3.9% | No | Form 4 |
Form 4 historysince 2023-12-15
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Sobel Alan D. | Sep 15 | Sep 16 | P | 1,900 | $6.12 | Purchase +$11,628 | 9,287 | No | Form 4 |
| Sobel Alan D. | Sep 15 | Sep 16 | P | 500 | $6.05 | Purchase +$3,025 | 9,787 | No | Form 4 |
| Sobel Alan D. | Sep 15 | Sep 16 | P | 100 | $6.01 | Purchase +$601 | 9,887 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Sep 15 | Sep 16 | P | 3,774 | $6.00 | Purchase +$22,644 | 100,996 | No | Form 4 |
| Capponi VincentPresident and COO | Sep 14 | Sep 16 | P | 1,800 | $6.07 | Purchase +$10,926 | 40,114 | No | Form 4 |
| Capponi VincentPresident and COO | Sep 14 | Sep 16 | P | 273 | $5.90 | Purchase +$1,611 | 40,387 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Sep 4 | Sep 9 | P | 200,000 | $0.35 | Purchase +$70,000 | 1,944,432 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Jun 15 | Jun 16 | P | 100,000 | $0.44 | Purchase +$44,000 | 638,113 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Jun 15 | Jun 15 | P | 10,333 | $0.43 | Purchase +$4,443 | 1,744,432 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Jun 12 | Jun 15 | P | 251,136 | $0.40 | Purchase +$100,454 | 1,734,099 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Nov 18, 2025 | Nov 20, 2025 | A | 100,000 | $0.64 | $64,000 | 1,482,963 | No | Form 4 |
| Sobel Alan D. | Aug 8, 2025 | Aug 8, 2025 | A · derivative | 22,000 | $1.00 | $22,000 | 22,000 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Aug 8, 2025 | Aug 8, 2025 | A | 70,000 | $0.00 | $0 | 473,025 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Aug 8, 2025 | Aug 8, 2025 | A · derivative | 95,000 | $1.00 | $95,000 | 95,000 | No | Form 4 |
| Capponi VincentPresident and COO | Aug 8, 2025 | Aug 8, 2025 | A | 89,100 | $0.00 | $0 | 766,268 | No | Form 4 |
| Capponi VincentPresident and COO | Aug 8, 2025 | Aug 8, 2025 | A · derivative | 111,100 | $1.00 | $111,100 | 111,100 | No | Form 4 |
| Kim Jiny | Aug 8, 2025 | Aug 8, 2025 | A · derivative | 22,000 | $1.00 | $22,000 | 22,000 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Aug 8, 2025 | Aug 8, 2025 | A | 71,500 | $0.00 | $0 | 538,113 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Aug 8, 2025 | Aug 8, 2025 | A · derivative | 90,000 | $1.00 | $90,000 | 90,000 | No | Form 4 |
| Bator Michael G. | Aug 8, 2025 | Aug 8, 2025 | A · derivative | 44,000 | $1.00 | $44,000 | 44,000 | No | Form 4 |
| Jones Edward Raymond | Aug 8, 2025 | Aug 8, 2025 | A · derivative | 22,000 | $1.00 | $22,000 | 22,000 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Aug 8, 2025 | Aug 8, 2025 | A | 105,600 | $0.00 | $0 | 1,382,963 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Aug 8, 2025 | Aug 8, 2025 | A · derivative | 136,400 | $1.00 | $136,400 | 136,400 | No | Form 4 |
| Bator Michael G. | Feb 24, 2025 | Mar 4, 2025 | O | 10,000 | $1.13 | $11,300 | 151,273 | No | Form 4 |
| Bator Michael G. | Feb 24, 2025 | Mar 4, 2025 | O · derivative | 15,879 | $1.13 | $17,943 | not reported | No | Form 4 |
| Sobel Alan D. | Feb 24, 2025 | Feb 26, 2025 | O | 21,950 | $1.13 | $24,804 | 145,757 | No | Form 4 |
| Sobel Alan D. | Feb 24, 2025 | Feb 26, 2025 | O · derivative | 21,950 | $1.13 | $24,804 | not reported | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Feb 24, 2025 | Feb 26, 2025 | O | 34,168 | $1.13 | $38,610 | 1,277,363 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Feb 24, 2025 | Feb 26, 2025 | O · derivative | 34,168 | $1.13 | $38,610 | not reported | No | Form 4 |
| Mariani Peter JChief Financial Officer | Feb 24, 2025 | Feb 26, 2025 | O | 32,625 | $1.13 | $36,866 | 466,613 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Feb 24, 2025 | Feb 26, 2025 | O · derivative | 32,625 | $1.13 | $36,866 | not reported | No | Form 4 |
| Capponi VincentPresident and COO | Feb 24, 2025 | Feb 26, 2025 | O | 12,000 | $1.13 | $13,560 | 677,168 | No | Form 4 |
| Capponi VincentPresident and COO | Feb 24, 2025 | Feb 26, 2025 | O · derivative | 12,000 | $1.13 | $13,560 | not reported | No | Form 4 |
| Mariani Peter JChief Financial Officer | Jan 17, 2025 | Jan 22, 2025 | X | 32,625 | $1.00 | $32,625 | 433,988 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Jan 17, 2025 | Jan 22, 2025 | X · derivative | 32,625 | $1.00 | $32,625 | not reported | No | Form 4 |
| Mariani Peter JChief Financial Officer | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 32,625 | not reported | not reported | 32,625 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 32,625 | not reported | not reported | 32,625 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Jan 17, 2025 | Jan 22, 2025 | X | 90,832 | $1.00 | $90,832 | 1,243,195 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Jan 17, 2025 | Jan 22, 2025 | X · derivative | 90,832 | $1.00 | $90,832 | not reported | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 90,832 | not reported | not reported | 90,832 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 90,832 | not reported | not reported | 90,832 | No | Form 4 |
| Sobel Alan D. | Jan 17, 2025 | Jan 22, 2025 | X | 21,950 | $1.00 | $21,950 | 123,807 | No | Form 4 |
| Sobel Alan D. | Jan 17, 2025 | Jan 22, 2025 | X · derivative | 21,950 | $1.00 | $21,950 | not reported | No | Form 4 |
| Sobel Alan D. | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 21,950 | not reported | not reported | 21,950 | No | Form 4 |
| Sobel Alan D. | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 21,950 | not reported | not reported | 21,950 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Jan 17, 2025 | Jan 22, 2025 | X | 16,233 | $1.00 | $16,233 | 403,025 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Jan 17, 2025 | Jan 22, 2025 | X · derivative | 16,233 | $1.00 | $16,233 | not reported | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 16,233 | not reported | not reported | 16,233 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 16,233 | not reported | not reported | 16,233 | No | Form 4 |
| Capponi VincentPresident and COO | Jan 17, 2025 | Jan 22, 2025 | X | 31,760 | $1.00 | $31,760 | 665,168 | No | Form 4 |
| Capponi VincentPresident and COO | Jan 17, 2025 | Jan 22, 2025 | X · derivative | 31,760 | $1.00 | $31,760 | not reported | No | Form 4 |
| Capponi VincentPresident and COO | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 31,760 | not reported | not reported | 31,760 | No | Form 4 |
| Capponi VincentPresident and COO | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 31,760 | not reported | not reported | 31,760 | No | Form 4 |
| Bator Michael G. | Jan 17, 2025 | Jan 22, 2025 | X | 15,879 | $1.00 | $15,879 | 141,273 | No | Form 4 |
| Bator Michael G. | Jan 17, 2025 | Jan 22, 2025 | X · derivative | 15,879 | $1.00 | $15,879 | not reported | No | Form 4 |
| Bator Michael G. | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 15,879 | not reported | not reported | 15,879 | No | Form 4 |
| Bator Michael G. | Jan 17, 2025 | Jan 22, 2025 | J · derivative | 15,879 | not reported | not reported | 15,879 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Dec 13, 2024 | Dec 16, 2024 | P | 20,000 | $0.96 | Purchase +$19,200 | 401,363 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Dec 12, 2024 | Dec 13, 2024 | P | 20,000 | $0.89 | Purchase +$17,800 | 381,363 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Dec 11, 2024 | Dec 13, 2024 | P | 11,363 | $0.89 | Purchase +$10,113 | 361,363 | No | Form 4 |
| Capponi VincentPresident and COO | Oct 4, 2024 | Oct 8, 2024 | A · derivative | 100,000 | $1.19 | $119,000 | 100,000 | No | Form 4 |
| Capponi VincentPresident and COO | Oct 4, 2024 | Oct 8, 2024 | A · derivative | 50,000 | $1.19 | $59,500 | 50,000 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Oct 4, 2024 | Oct 8, 2024 | A · derivative | 100,000 | $1.19 | $119,000 | 100,000 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Oct 4, 2024 | Oct 8, 2024 | A · derivative | 50,000 | $1.19 | $59,500 | 50,000 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Aug 14, 2024 | Aug 16, 2024 | A | 110,000 | $0.00 | $0 | 110,000 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Aug 14, 2024 | Aug 16, 2024 | A | 65,000 | $0.00 | $0 | 175,000 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Aug 14, 2024 | Aug 16, 2024 | A | 175,000 | $0.00 | $0 | 350,000 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Aug 14, 2024 | Aug 16, 2024 | A · derivative | 80,000 | $0.90 | $72,000 | 80,000 | No | Form 4 |
| Mariani Peter JChief Financial Officer | Aug 14, 2024 | Aug 16, 2024 | A · derivative | 215,000 | $0.90 | $193,500 | 215,000 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Apr 2, 2024 | Apr 4, 2024 | A | 96,000 | $0.00 | $0 | 1,164,704 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Apr 2, 2024 | Apr 4, 2024 | A · derivative | 124,000 | $0.96 | $119,040 | 124,000 | No | Form 4 |
| Kim Jiny | Apr 2, 2024 | Apr 4, 2024 | A · derivative | 22,000 | $0.96 | $21,120 | 22,000 | No | Form 4 |
| Capponi VincentPresident and COO | Apr 2, 2024 | Apr 4, 2024 | A | 81,000 | $0.00 | $0 | 665,134 | No | Form 4 |
| Capponi VincentPresident and COO | Apr 2, 2024 | Apr 4, 2024 | A · derivative | 101,000 | $0.96 | $96,960 | 101,000 | No | Form 4 |
| Bator Michael G. | Apr 2, 2024 | Apr 4, 2024 | A · derivative | 44,000 | $0.96 | $42,240 | 44,000 | No | Form 4 |
| Bloch Kathleen P.Chief Financial Officer | Apr 2, 2024 | Apr 4, 2024 | A | 65,000 | $0.00 | $0 | 532,941 | No | Form 4 |
| Bloch Kathleen P.Chief Financial Officer | Apr 2, 2024 | Apr 4, 2024 | A · derivative | 87,000 | $0.96 | $83,520 | 87,000 | No | Form 4 |
| Sobel Alan D. | Apr 2, 2024 | Apr 4, 2024 | A · derivative | 22,000 | $0.96 | $21,120 | 22,000 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Apr 2, 2024 | Apr 4, 2024 | A | 61,000 | $0.00 | $0 | 409,433 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Apr 2, 2024 | Apr 4, 2024 | A · derivative | 86,000 | $0.96 | $82,560 | 86,000 | No | Form 4 |
| Jones Edward Raymond | Apr 2, 2024 | Apr 4, 2024 | A · derivative | 22,000 | $0.96 | $21,120 | 22,000 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Mar 29, 2024 | Apr 2, 2024 | A · derivative | 129,998 | $0.95 | $123,498 | 129,998 | No | Form 4 |
| Bloch Kathleen P.Chief Financial Officer | Mar 29, 2024 | Apr 2, 2024 | A · derivative | 49,038 | $0.95 | $46,586 | 49,038 | No | Form 4 |
| Capponi VincentPresident and COO | Mar 29, 2024 | Apr 2, 2024 | A · derivative | 48,923 | $0.95 | $46,477 | 48,923 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Mar 29, 2024 | Apr 2, 2024 | A · derivative | 47,088 | $0.95 | $44,734 | 47,088 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Dec 13, 2023 | Dec 15, 2023 | P | 75,188 | $1.33 | Purchase +$100,000 | 1,068,704 | No | Form 4 |
| Chan Phillip P.Chief Executive Officer | Dec 13, 2023 | Dec 15, 2023 | P · derivative | 26,315 | $2.00 | Purchase +$52,630 | 26,315 | No | Form 4 |
| Kim Jiny | Dec 13, 2023 | Dec 15, 2023 | P | 7,519 | $1.33 | Purchase +$10,000 | 77,819 | No | Form 4 |
| Kim Jiny | Dec 13, 2023 | Dec 15, 2023 | P · derivative | 2,631 | $2.00 | Purchase +$5,262 | 2,631 | No | Form 4 |
| Bloch Kathleen P.Chief Financial Officer | Dec 13, 2023 | Dec 15, 2023 | P | 37,594 | $1.33 | Purchase +$50,000 | 467,941 | No | Form 4 |
| Bloch Kathleen P.Chief Financial Officer | Dec 13, 2023 | Dec 15, 2023 | P · derivative | 13,157 | $2.00 | Purchase +$26,314 | 13,157 | No | Form 4 |
| Jones Edward Raymond | Dec 13, 2023 | Dec 15, 2023 | P | 7,519 | $1.33 | Purchase +$10,000 | 88,834 | No | Form 4 |
| Jones Edward Raymond | Dec 13, 2023 | Dec 15, 2023 | P · derivative | 2,631 | $2.00 | Purchase +$5,262 | 2,631 | No | Form 4 |
| Bator Michael G. | Dec 13, 2023 | Dec 15, 2023 | P | 37,594 | $1.33 | Purchase +$50,000 | 125,394 | No | Form 4 |
| Bator Michael G. | Dec 13, 2023 | Dec 15, 2023 | P · derivative | 13,157 | $2.00 | Purchase +$26,314 | 13,157 | No | Form 4 |
| Capponi VincentPresident & COO | Dec 13, 2023 | Dec 15, 2023 | P | 18,797 | $1.33 | Purchase +$25,000 | 584,134 | No | Form 4 |
| Capponi VincentPresident & COO | Dec 13, 2023 | Dec 15, 2023 | P · derivative | 6,578 | $2.00 | Purchase +$13,156 | 6,578 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Dec 13, 2023 | Dec 15, 2023 | P | 22,557 | $1.33 | Purchase +$30,001 | 348,433 | No | Form 4 |
| Deliargyris EfthymiosChief Medical Officer | Dec 13, 2023 | Dec 15, 2023 | P · derivative | 7,894 | $2.00 | Purchase +$15,788 | 7,894 | No | Form 4 |
| Sobel Alan D. | Dec 13, 2023 | Dec 15, 2023 | P | 22,557 | $1.33 | Purchase +$30,001 | 101,857 | No | Form 4 |
| Sobel Alan D. | Dec 13, 2023 | Dec 15, 2023 | P · derivative | 7,894 | $2.00 | Purchase +$15,788 | 7,894 | No | Form 4 |